Hi, 
I've been reading on design of catalog service/statestore.
Mostly from White paper about Impala - 
http://cidrdb.org/cidr2015/Papers/CIDR15_Paper28.pdf
I got it from Impala confluence wiki 
https://cwiki.apache.org/confluence/display/IMPALA/Impala+Presentations%2C+Papers+and+Blog+Posts
It’s rather interesting – it has fairly detailed (but clear) design of 
different components
 
Are there other sources (except the source code)?

Question 2: I’ve been wondering does Impalad caches files location itself – 
they don’t seem
to be stored in hive metastatore. Just the partition location is there,
right?

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